/*
 *  Copyright 1999-2019 Seata.io Group.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package io.seata.server.transaction.at;

import com.fasterxml.jackson.databind.ObjectMapper;
import io.seata.common.exception.StoreException;
import io.seata.common.util.StringUtils;
import io.seata.core.exception.BranchTransactionException;
import io.seata.core.exception.TransactionException;
import io.seata.core.model.BranchType;
import io.seata.core.rpc.RemotingServer;
import io.seata.server.coordinator.AbstractCore;
import io.seata.server.session.BranchSession;
import io.seata.server.session.GlobalSession;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import static io.seata.common.Constants.AUTO_COMMIT;
import static io.seata.common.Constants.SKIP_CHECK_LOCK;
import static io.seata.core.exception.TransactionExceptionCode.LockKeyConflict;

/**
 * The type at core.
 *
 * @author ph3636
 */
public class ATCore extends AbstractCore {

	private final ObjectMapper objectMapper = new ObjectMapper();

	public ATCore(RemotingServer remotingServer) {
		super(remotingServer);
	}

	@Override
	public BranchType getHandleBranchType() {
		return BranchType.AT;
	}

	@Override
	protected void branchSessionLock(GlobalSession globalSession, BranchSession branchSession)
			throws TransactionException {
		String applicationData = branchSession.getApplicationData();
		boolean autoCommit = true;
		boolean skipCheckLock = false;
		if (StringUtils.isNotBlank(applicationData)) {
			try {
				Map<String, Object> data = objectMapper.readValue(applicationData, HashMap.class);
				Object clientAutoCommit = data.get(AUTO_COMMIT);
				if (clientAutoCommit != null && !(boolean) clientAutoCommit) {
					autoCommit = (boolean) clientAutoCommit;
				}
				Object clientSkipCheckLock = data.get(SKIP_CHECK_LOCK);
				if (clientSkipCheckLock instanceof Boolean) {
					skipCheckLock = (boolean) clientSkipCheckLock;
				}
			}
			catch (IOException e) {
				LOGGER.error("failed to get application data: {}", e.getMessage(), e);
			}
		}
		try {
			if (!branchSession.lock(autoCommit, skipCheckLock)) {
				throw new BranchTransactionException(LockKeyConflict,
						String.format("Global lock acquire failed xid = %s branchId = %s", globalSession.getXid(),
								branchSession.getBranchId()));
			}
		}
		catch (StoreException e) {
			if (e.getCause() instanceof BranchTransactionException) {
				throw new BranchTransactionException(((BranchTransactionException) e.getCause()).getCode(),
						String.format("Global lock acquire failed xid = %s branchId = %s", globalSession.getXid(),
								branchSession.getBranchId()));
			}
			throw e;
		}
	}

	@Override
	protected void branchSessionUnlock(BranchSession branchSession) throws TransactionException {
		branchSession.unlock();
	}

	@Override
	public boolean lockQuery(BranchType branchType, String resourceId, String xid, String lockKeys)
			throws TransactionException {
		return lockManager.isLockable(xid, resourceId, lockKeys);
	}

}
